Energy must be transformed in ecosystems because

a.

energy cannot be created or destroyed

b.

an organism’s energy must go somewhere

c.

an organism’s energy must come from somewhere

d.

all of the above

How do mountains influence climate?

Based on your knowledge of industrialization, which of the following statements best describes what is happening in this photo taken in the us around 1910? a. the children pictured here likely worked a 4 - 6-hour shift after school, five days a week, for minimum wage. b. the children pictured here are working illegally, as child labor was prohibited in the late 1880s. the children pictured here likely worked a 12-hour day, six days a week, for about one dollar a week d. the children pictured here likely earned good wages, were protected from risk of injury, and were likely to have a successful, long-term career in this industry.

According to the population pyramid, in 2000 china had about 120 million people in which age-group?